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Med Vet Entomol ; 32(4): 504-508, 2018 12.
Article in English | MEDLINE | ID: mdl-30003568

ABSTRACT

The identification of bloodmeal sources in triatomine bugs (Hemiptera: Reduviidae) is important in understanding vector-host associations and in measuring the risk for Chagas' disease transmission. The bloodmeal sources of triatomines infected with Trypanosoma cruzi (Trypanosomatida: Trypanosomatidae) caught in houses in central Brazil (Goiás State and the Federal District) were investigated during 2012-2014. Mitochondrial cytochrome b amplicons were used to identify bloodmeals through high-resolution melting and DNA sequencing. Most bugs were found to have fed on either humans (45.7%) or chickens (43.1%). Human blood was detected in Triatoma sordida (n = 22/50 bugs), Triatoma pseudomaculata (n = 7/11 bugs), Panstrongylus megistus (n = 10/24 bugs), Panstrongylus geniculatus (n = 1/3 bugs) and Rhodnius neglectus (n = 18/28 bugs) (all: Hemiptera: Reduviidae). Sequencing identified Necromys (Rodentia: Cricetidae) mouse blood in P. geniculatus and Tropidurus (Squamata: Tropiduridae) lizard blood in T. pseudomaculata and T. sordida. These findings reveal new vector-host associations. The present results suggest frequent contact between humans and T. cruzi-infected triatomines in central Brazil and indicate that Chagas' disease transmission by native vectors is an ongoing threat.


Subject(s)
Chagas Disease/transmission , Chickens/blood , Sigmodontinae/blood , Triatominae/physiology , Trypanosoma cruzi/physiology , Animals , Brazil , Cats , Chickens/parasitology , DNA/chemistry , DNA/metabolism , Dogs , Fluorescent Dyes , Freezing , Host-Parasite Interactions , Hot Temperature , Housing , Humans , Lizards/blood , Opossums , Polymerase Chain Reaction , Sheep , Sigmodontinae/parasitology , Triatominae/parasitology
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